International Journal of Mineral Processing最新文献_第8页

A Bond Work index mill ball charge and closing screen product size distributions for grinding crystalline grains 用于研磨晶粒的键合功指数磨球装料和闭合筛网产品尺寸分布

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.05.011

Mario Menéndez, Malcolm Gent, Susana Torno, Nerea Crespo

{"title":"A Bond Work index mill ball charge and closing screen product size distributions for grinding crystalline grains","authors":"Mario Menéndez, Malcolm Gent, Susana Torno, Nerea Crespo","doi":"10.1016/j.minpro.2017.05.011","DOIUrl":"10.1016/j.minpro.2017.05.011","url":null,"abstract":"<div>Ball mill charge size distributions originally specified for Bond grindability tests to determine the Bond Work index (BWi) are not commercially available. Those proposed to date do not match all of Bond's (1961) original specifications of total ball mass, number and surface area. An alternative mill ball charge is proposed that closely approximates Bond's original total ball mass, number of balls and ball surface area.Results of 30 Bond Work index tests of six pure materials (calcite, magnesite, labradorite (feldspar), quartz, andalusite and glass) using closing screen apertures (P1) values of 500, 250, 125, 90 and 63μm are analysed. The samples were selected on the basis of having distinct hardness's (Mohs hardness 3 to 7.5), being relatively free of crystallographic defects and having distinct cleavage properties The 80 percentile size of the fines produced (P80) concur with those of published values.The trend based of P80 values for P1 values of 150 to 44μm recommended by Bond poorly fit with published P1 values >250μm. It is demonstrated that the BWi test P1 values of mono-mineralogical or mono-material samples determines the P80 value obtained. Based on test results of this investigation a polynomial exponential equation relating P80 to P1 values with an R2 correlation factor of 0.9977 is presented. This relation is independent of the tested material hardness and crystallographic defects and planes of weakness.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"165 ","pages":"Pages 8-14"},"PeriodicalIF":0.0,"publicationDate":"2017-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48056787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Geopolymers based on calcined tunisian clays: Effects of alkaline solution on vibrational spectra and mechanical properties 基于煅烧突尼斯粘土的地质聚合物：碱性溶液对振动光谱和力学性能的影响

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.05.012

Samira Selmani , Ali Sdiri , Samir Bouaziz , Sylvie Rossignol

{"title":"Geopolymers based on calcined tunisian clays: Effects of alkaline solution on vibrational spectra and mechanical properties","authors":"Samira Selmani , Ali Sdiri , Samir Bouaziz , Sylvie Rossignol","doi":"10.1016/j.minpro.2017.05.012","DOIUrl":"10.1016/j.minpro.2017.05.012","url":null,"abstract":"<div>The effects of alkaline solution and calcined clays on vibrational spectra and mechanical properties were studied on geopolymer samples prepared from two alkaline solutions, calcined clays and three metakaolins. Structural evolution of the prepared geopolymers was characterized using FTIR spectroscopy and compression tests. Our results indicated high positive correlation between reactivity and compressive strength of the studied samples. Commercial potassium silicate and laboratory prepared k-silicate solutions were used to assess their effects on the prepared geopolymers. It was also observed that various secondary phases appeared, causing a slight change in the species' reactivity. Finally, it was concluded that changing alkaline solution and calcined clays decreased the mechanical properties, but increased the FTIR shift values. However, further work is needed to study the effects of alkaline solutions and natural clays from Tunisia on the properties of the prepared geopolymer. This is compulsory for prospective application of those products in various industries.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"165 ","pages":"Pages 50-57"},"PeriodicalIF":0.0,"publicationDate":"2017-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41684057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Effect of scraper movement on the separation performance of air dense medium fluidized bed 刮板运动对空气致密介质流化床分离性能的影响

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.05.010

Nianxin Zhou , Zhenfu Luo , Wei Huang , Yuemin Zhao

引用次数: 4

Selective reverse flotation of apatite from dolomite in collophanite ore using saponified gutter oil fatty acid as a collector 皂化地沟油脂肪酸捕收剂从胶磷矿白云石中选择性反浮选磷灰石

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.06.004

Xing Liu , Chengxiu Li , Huihua Luo , Renju Cheng , Feiyan Liu

{"title":"Selective reverse flotation of apatite from dolomite in collophanite ore using saponified gutter oil fatty acid as a collector","authors":"Xing Liu , Chengxiu Li , Huihua Luo , Renju Cheng , Feiyan Liu","doi":"10.1016/j.minpro.2017.06.004","DOIUrl":"10.1016/j.minpro.2017.06.004","url":null,"abstract":"<div>Reverse flotation is an effective method for separating apatite from gangue minerals (such as dolomite) in collophanite ore. However, collophanite ore flotation using traditional fatty acid collectors is uneconomical because of the relatively high cost of the raw materials. In this work, saponified gutter oil fatty acid (GOFA) was used as the collector, and its effect on collophanite ore flotation and the mechanism of adsorption were studied. The results showed that Ca2+ is the active site for reaction with GOFA and initiates apatite flotation. The dissolution of Ca2+ from dolomite was found to be thermodynamically more favorable than that from apatite, and the relative abundance of Ca2+ enhanced the reaction of dolomite with GOFA. XPS analysis revealed that the interaction between GOFA and magnesium on the dolomite surface strengthened chemisorption. As magnesium is a major constituent of dolomite, but not of apatite, GOFA was selectively chemisorbed onto the dolomite surface. Closed-circuit reverse flotation tests using GOFA as the collector resulted in an excellent concentrate with 28.46  <!-->wt% MgO, corresponding to a P2O5 recovery of 87.2%. GOFA was demonstrated to exhibit outstanding selectivity for dolomite in the reverse flotation of collophanite ore. The use of GOFA as an environment-friendly, cost-effective, and selective collector is expected to provide new insights into low-cost collophanite ore flotation.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"165 ","pages":"Pages 20-27"},"PeriodicalIF":0.0,"publicationDate":"2017-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.06.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43333509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 57

Formation kinetics of Na2SnO3 from SnO2 and Na2CO3 roasted under CO-CO2 atmosphere SnO2和Na2CO3在CO-CO2气氛下焙烧生成Na2SnO3的动力学研究

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.06.002

Bingbing Liu, Yuanbo Zhang, Zijian Su, Guanghui Li, Tao Jiang

引用次数: 10

Effect of design and operational parameters on particle morphology in ball mills 设计和操作参数对球磨机颗粒形态的影响

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.06.001

Farhad Moosakazemi , M.R. Tavakoli Mohammadi , M. Mohseni , M. Karamoozian , M. Zakeri

{"title":"Effect of design and operational parameters on particle morphology in ball mills","authors":"Farhad Moosakazemi , M.R. Tavakoli Mohammadi , M. Mohseni , M. Karamoozian , M. Zakeri","doi":"10.1016/j.minpro.2017.06.001","DOIUrl":"10.1016/j.minpro.2017.06.001","url":null,"abstract":"<div>Different factors involving in grinding of ore cause various breakage mechanisms. These different mechanisms differ the morphology of ground particles. In this study, the effect of ball mill types, feed sizes, and ball surface area have been investigated on the morphology of ground quartz particles using MBL cruise optical microscope and Olympus E-510 camera. Measured two-dimensional particle projection was expressed mathematically such as circularity, roundness and aspect ratio by ImageJ software. > 20,000 particles were morphologically measured for image analysis. Results show that circularity and roundness of ground particles are enhanced in an ordinary ball mill equipped with smooth liner (OBM). While higher aspect ratio of ground particles are achieved in cylindrical ball mill equipped with wavy liner (CBM). Consequently, the dominant breakage mechanism for OBM and CBM are abrasion and impact, respectively. Circularity and roundness values of coarse-grained ground particles are more than fine-grained particles. The increase of ball surface area causes the increase of circularity as well as roundness values and the decrease of aspect ratio value.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"165 ","pages":"Pages 41-49"},"PeriodicalIF":0.0,"publicationDate":"2017-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43689695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Effect of pH on the release of heavy metals from stone coal waste rocks pH值对石煤废石中重金属释放的影响

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI: 10.1016/j.minpro.2017.05.001

Hai Lin , Ganyu Li , Yingbo Dong , Jie Li

{"title":"Effect of pH on the release of heavy metals from stone coal waste rocks","authors":"Hai Lin , Ganyu Li , Yingbo Dong , Jie Li","doi":"10.1016/j.minpro.2017.05.001","DOIUrl":"10.1016/j.minpro.2017.05.001","url":null,"abstract":"<div>Static leaching experiments were performed to detect the heavy metals release rule of stone coal waste rocks at different solution pH levels. Results showed that solution pH exerted a significant influence on mineral dissolution. As solution pH decreased, the dissolved quantities of minerals increased gradually. With leaching time progressing, the dissolved quantities of Cr and V at each experimental pH level increased almost all the way, while As and Cd dissolved quickly at first and then the dissolution decreased. The dissolved quantities of major elements in the stone coal waste rocks were also detected.Ca and Mg dissolution increased rapidly in the beginning and then decreased slowly; however, the dissolved quantities of Al and Fe were relatively low. The maximum dissolved quantities at a solution pH of 2 were observed in the following order: Ca (2695.65mg/kg)>Mg (510.92mg/kg)>Al (23.64mg/kg)>Fe (11.55mg/kg)>V (6861μg/kg)>Cr (1005.35μg/kg)>Cd (751.71μg/kg)>As (323.66μg/kg). It can be seen that the dissolution of the elements is not correlated with their total content in the stone coal waste rocks, but is related with their content in easily soluble fraction (F1). The stone coal waste rocks were found to exhibit a relatively high neutralizing power, in that, in the range of initial solution pH at 3–9, final leachate pH stabilized at 8.3–8.5. This neutralizing ability was conducive to precipitate newly dissolved heavy metals, thus was favorable for reducing the waste rocks environmental toxicity.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"165 ","pages":"Pages 1-7"},"PeriodicalIF":0.0,"publicationDate":"2017-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44774644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 35

Ammoniacal thiosulfate leaching of refractory oxide gold ore 难处理氧化金矿的硫代硫酸盐氨浸

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.003

Esmaeil Mohammadi , Mehdi Pourabdoli , Mehdi Ghobeiti-Hasab , Akbar Heidarpour

{"title":"Ammoniacal thiosulfate leaching of refractory oxide gold ore","authors":"Esmaeil Mohammadi , Mehdi Pourabdoli , Mehdi Ghobeiti-Hasab , Akbar Heidarpour","doi":"10.1016/j.minpro.2017.05.003","DOIUrl":"10.1016/j.minpro.2017.05.003","url":null,"abstract":"<div>Ammoniacal thiosulfate leaching of refractory oxide gold ore was investigated. According to X-ray fluorescence and fire assay analyses, the ore contained about 33.01     ppm Au. Moreover, X-ray diffraction analysis and mineralogical studies using polished thin sections showed that the ore was composed of quartz, epidote, muscovite, and orthoclase as major minerals and goethite and jarosite as minor minerals. The effects of temperature, leaching time, and the concentrations of thiosulfate, copper ion, and ammonia on the gold extraction were studied. Maximum gold extraction of 55% was obtained using thiosulfate, ammonia, and copper sulfate concentrations of 0.1      <!-->h indicating a change in the process mechanism.</div>","PeriodicalId":14022,"journal":{"name":"International Journal of Mineral Processing","volume":"164 ","pages":"Pages 6-10"},"PeriodicalIF":0.0,"publicationDate":"2017-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.minpro.2017.05.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42915313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Implementation of sonochemical leaching for preparation of nano zero-valent iron (NZVI) from natural pyrite mechanochemically reacted with Al 以天然黄铁矿为原料，通过机械化学反应制备纳米零价铁(NZVI)

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.002

B.N. Akhgar , P. Pourghahramani

引用次数: 3

The effect of the extent of polymerisation of a slag structure on the strength of alkali-activated slag binders 渣结构的聚合程度对碱活化渣粘结剂强度的影响

International Journal of Mineral Processing Pub Date : 2017-07-10 DOI: 10.1016/j.minpro.2017.05.007

P.M. Keeley , N.A. Rowson , T.P. Johnson , D.E. Deegan

引用次数: 25